I Need Some Serious Help To Study For My Chemistry Test?
Now I can't help with all of these, naming compounds is my Achilles heel, but I can do some of these. 1. Now, what I always remember for this is "multiply out and divide in" and it really helps for this diagram: Grams *--------/ Moles /--------* Particles molar mass Avogadro's number 4. The molar ratio is definitely a harder compound and how you determine it is if you are given a reaction such as: 2H2 + O2 ------> 2H2O The molar ratio between the H2 and the H2O would be 2:2 because the coefficients are 2 and 2 The molar ration between the O2 and H2O would be 1:2 because of the coefficients. The molar ratio is used when there needs to be a conversion between the two different substances in a reaction. Such as if you are given 50g of O2 and you need to find how many grams of H2O would be able to be used you would set it up like this: 50gO2/32gO2 Then, once you have your moles of O2 which is 1.6mols you would: 1.6mol*(2mol H2O/1 mol O2)=3.2mol H2O That was the stage where you used the molar ratio with what you want over what you have. Now that you have the moles of H2O you can then multiply it by its molar mass and get the answer. I really hope this helps!
In a chemical reaction how do you find the products?
For the best answers, search on this site https://shorturl.im/axVbA Every reaction given is called a double displacement (or double replacement) reaction. This simply means that an ionic compound consisting of cations (positive ions) and anions (negative ions) reacts with another ionic compound consisting of other cations and anions. As a result of the reaction, the cations of one compound pair with the anions of the other, and the anions of the other pair with the cations of the first. Remarks: - It is important to make sure that each compound is electrically neutral meaning that the sum of the charges of the cations and anions in each compound in the chemical equation is zero. - Once the charges are balanced, the next step is to balance the number of atoms using the usual method of balancing chemical equations -- which I assume you know how to do. Example: Na_3(PO_4)(aq) + Ba(OH)_2(aq) Cation of the first compound is Na-----(1+ charge) Anion of the first compound is (PO4) ----(3- charge poly-atomic) Cation of the second compound is Ba----(2+ charge) Anion of the second compound is (OH)----(1- charge poly-atomic) The cations of one compound pair with the anions of the other, and the anions of the other pair with the cations of the first. ----> NaOH.......... cation is 1+ anion is 1-, compound is electrically neutral -----> Ba_3(PO_4)_2........ Cation is 2+, anion is 3-.... in order for the compound to be electrically neutral, there needs to be three cations and two anions. Adding the sums of the charges gives 3(2)+2(-3)=0.. compound is neutral Equation is now: Na_3(PO_4)(aq) + Ba(OH)_2(aq) ----> NaOH + Ba_3(PO_4)_2 Balancing gives: 2Na_3(PO_4)(aq) + 3Ba(OH)_2(aq) ----> 6NaOH + Ba_3(PO_4)_2 Hope that helps.
It is not the gravity force, it's the electric one. Not Newton, but Coulomb. The magnetic contributorss are much weaker, so we can generally ignore them.It is stored as electric potential energy of charge separation. There are three waya to store it, as attraction or as repulsion. Like charges repel, opposites attract. So + + or - - or + - forces represent potential.The positive charge is carried by the atomic nucleua and the negstive by electrons. From a distance matter appears electrically neutral, but close in there is an equilibrium energy state and a geometrjc charge configuration in space we call chemical bonding.The rules of bonding dictate where charges sit in space. Chemistry occurs basically by rearrangemebts of these charge patterns into new patterns, with a different total potential enetgy. The we see changes in pofential.It applies to any type of bonding too, not kust molecules. Not everything is molecular. Think of tablecsalt, there is a potential energy in that too. You can't lower that in salt alone, but you could increase the potential of salt by vapourising it which creates more surface energy. Even morec energy could be stored by ionising it.We also see corresponding changes in kinetic energies or radiant energy effects, because electro-magnetic radiation can be coupled to the motion of separated charges which we call dipoles.
For a long time it was believed that only proteins have the capability of being an enzyme- the biocatalyst. But in 1989, investigators Sidney Altman and Thomas R. Cech were awarded the Nobel Prize in Chemistry for their discovery of catalytic properties of RNA, which were called ribozymes(example: Ribonuclease P).Yet, when we talk of metabolic pathways and enzymes involved are actually the proteins with capabilities of being an enzymes. These include : 1. catalytic power,2. specificity3. ability to respond to regulation or self regulationThese powers enables them to reduce the activation energy required for the reaction required.Now, The chemistry!!In general, a functional enzyme has the following:1. A sequence of amino acids i.e. peptide chain folded in higher structure such that the structure has a catalytic site and in some an allosteric regulatory site too. The active sites have certain critical amino acids that accounts for the electron donation and accepting relay during reaction.For example, serine proteases like trypsin has a catalytic triad; Asp 102, His 57, and Ser 195. Chemically amino acids are C,N,H,O and in 2 cases S and Se in 1. 2. CofactorsA cofactor is a non-protein chemical compound that is required for the protein's biological activity.i recommend a visit to ENZYME search by cofactor for a simple insight that how incomplete an enzyme is without its Cofactor.To sum up,Chemically enzymes are nothing but a beautiful bouquet of many Carbon, hydrogen, nitrogen, oxygen, sulphur along with few metal ions supported with a varied stalk of co-enzymes, uniquely arranged in such a way that each bouquet has its own fragrance ( the specificity)!!Thanks for reading!!Sources: Concepts in Biochemistry - Cutting EdgeBiochemistry, 5th Edition Reginald H. Garrett , Charles M. Grishamand few personal perspectives and acquired knowledge!
Compare and Contrast respiration and fermentation?
Aerobic Respiration is the following chemical formula: C6H12O6 (Glucose) + 6O2 (Oxygen) ------> 6CO2 (Carbon Dioxide) + 6H2O (Water) and enough energy to convert 38ADP (Adenosine Diphosphate) + 38PO4 (Phosphate) ----> 38ATP (Adenosine Triphosphate) (Your biology teacher probably won't make you memorize the ADP thing, the important thing to know is the number for that part) Lactic Acid Fermentation is the following chemical formula: C6H1206 (Glucose) ------> 2C3H6O3 (Lactic Acid) and enough energy to convert 2ADP (Adenosine Diphosphate) + 2PO4 (Phosphate) --------> 2ATP (Adenosine Triphosphate) It should be noted that lactic acid has to be turned back into glucose by the liver later on, so the only use that it has is a source of energy to keep cells alive when there is no oxygen to do so. So, the differences are: -Respiration provides much more energy than fermentation -Fermentation leaves Lactic acid, which must be turned back into glucose later on and can be harmful if too much accumulates (that's why you get cramps) -Respiration gives off water and carbon dioxide -Respiration gives nearly twenty times more energy than fermentation -fermentation does not require oxygen The similarities are: -Both use glucose -both give off energy
Please help me with these physical science questions. Easy 10 points!?
Its fill in the blanks. Here are the choices: Amounts, atoms, chemical reaction, coefficients, equation, forms, formulas, products, reactants, substance, subscripts symbols, and words. Now here is the paragraph. A ____ is a change in which one or more substances are converted into new substances. A chemical ___ is a way to describe a chemical reaction using chemical formulas and other symbols. In a chemical equation, the substances on the left side of the arrow that react are the starting substances called ___. The substances on the right side of the arrow are the substances produced from the reaction, called ___. In a chemical equation, the numbers to the left of the formulas for reactants and products are called ___. They represent the number of units of each ___ taking part in a chemical reaction. Knowing the number of units helps chemists to add the correct ___ of reactants to a reaction. A balanced chemical equation has the same number of ___ of each element on both sides of the equation. There are several rules of balancing an equation. First, describe the reaction in ___, putting the reactants on the left side and the products on the right side. Next, write a chemical equation for the reaction using ___ and ___. To balance the atoms in an equation you must choose the correct coefficients. Never change ___ of a correct formula to balance an equation. Please help me! Thank you in advanced!
Sodium - NaChemical properties of sodium - Health effects of sodium - Environmental effects of sodiumAtomic number11Atomic mass22.98977 g.mol-1Electronegativity according to Pauling0.9Density0.97 Registered & Protected by MarkMonitor-3at 20 °CMelting point97.5 °CBoiling point883 °CVanderwaals radius0.196 nmIonic radius0.095 (+1) nmIsotopes3Electronic shell[Ne] 3s1Energy of first ionisation495.7 kJ.mol-1Standard potential- 2.71 VDiscovered bySir Humphrey Davy in 1807SodiumChemical element, symbol: Na, atomic number: 11 and atomic weight 22,9898. It’s a soft metal, reactive and with a low melting point, with a relative density of 0,97 at 20ºC (68ºF). From the commercial point of view, sodium is the most important of all the alkaline metals.Sodium reacts quickly with water, and also with snow and ice, to produce sodium hydroxide and hydrogen. When it’s exposed to air, metallic sodium recently cut looses its silvery appearance and acquires an opaque grey colour due to the formation of a sodium oxide coating. Sodium doesn’t react with nitrogen, not even at very high temperatures, but it can react with ammonia to form sodium amide. Sodium and hydrogen react above 200ºC (390ºF) to form sodium hydride. Sodium hardly reacts with carbon, but it does react with halogens. It also reacts with various metallic halides to form the metal and sodium chloride. Sodium doesn’t react with paraffinic hydrocarbons, but it forms addition compounds with naphthalene and other aromatic polycyclic compounds and with aryl alkenes. The reaction of sodium with alcohols is similar to the reaction of sodium with water, but slower. There are two general reactions with organic halides. One of them requires the condensation of two organic compounds, which form halogens when those are eliminated. The second type of reaction includes the replacement of halogen by sodium, to obtain a sodium organic compound.Read more: http://www.lenntech.com/periodic...
Anyone who tells you that they understand how God works is trying to sell you something, and you should be wary of it.After all, there are thousands of religions around the world, and millions of people contradicting each other who claim to know God’s will, God’s ways, and God’s methods. None of them truly agree, except perhaps in incidental details. Many of them have extremely rich “ministries.” Lots of them make public pronouncements. They condemn others for their sins while being quite indulgent in their own secret — or not so secret — ways.You really have no reason to trust them, you know. And as for God, He hasn’t been too keen on making sure people really know how He works. He could do so with his omnipotent power and omniscient knowledge. But instead, we have contradictory testimonies. Even inside the Christian religion there are nearly 40000 different denominations and doctrines, all markedly different in significant ways, all claiming to know God and how God works.If you want to have faith, you will have to do it the hard way. Discover for yourself what you think God is like, who God is, and what sorts of things God does. You may be as right as anyone else, or just as wrong as everyone else. But it is your call and your life.